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Cumulus Aerial 250 vs Katabatic Gear Alsek 22°F

Weight and specs compared for 2026 — and which one to choose.

Cumulus Aerial 250 is the lighter option — 69 g lighter than the Katabatic Gear Alsek 22°F (15% less weight). If grams matter to you, that is the one to beat.
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Spec Cumulus Aerial 250 Katabatic Gear Alsek 22°F
Weight 385 g · 0.385 kg · 0.85 lb 454 g · 0.454 kg · 1.00 lb
Brand Cumulus Katabatic Gear
Category Sleep System Sleep System
Cumulus Aerial 250
385 g

Ultralight down sleeping bag with 900 FP goose down, single-layer design with no zipper, perfect for thru-hiking and backpacking.

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Katabatic Gear Alsek 22°F
454 g

Premium 850-fill down sleeping quilt rated to 22°F.

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Cumulus Aerial 250 vs Katabatic Gear Alsek 22°F: which should you buy?

If saving weight is your priority, the Cumulus Aerial 250 wins — at 385 g it is 69 g (15%) lighter than the Katabatic Gear Alsek 22°F (454 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest sleep system page, or browse the full gear weight database.

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